"Their grades are based on objective assessment of properties of underlying technologies." What were the grades for apps/protocols that run on closed, propriet

"Their grades are based on objective assessment of properties of underlying technologies." What were the grades for apps/protocols that run on closed, proprietary basebands with, in some cases, DMA ? Or on devices with embedded, parallel computers that can run arbitrary java programs uploaded, at any time, by the carrier, without the users' knowledge[1] ? All fails, right ? Straight "F"s ? [1] These are called "SIM chips"